Alternative I/O address for Adaptec 1540B?

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Article #71323

#71323

From: Nigel Barker
Date: Tue, 05 Dec 1995 00:00

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Has anyone changed the base I/O address of an Adaptec 1540B SCSI controller?

The default is 330 which clashes with my MPU 401. 
Change the MIDI address to its alternative of 300 & it clashes with the Ethernet
card.
Change the network card to its alternative of 200 & it clashes with the Joystick
Port. 

You get the idea...

The slim pamphlet that I got with my card says to change jumpers on J7 so for
example the default is pin 2 jumpered. Various combinations of jumpers on pins
2,3 &4 allow for six different AT I/O Port Adresses to be set.

Unfortunately unless I am missing something here changing these jumpers has no
effect at all on the base address. It stays as 330 & conflicts with the MIDI
port. Actual error essage is something like 'No host device at address 330"

I have disabled the MIDI port as a quick fix but would appreciate if anyone has
some further insights into this.
-- 
Nigel Barker - nigel@openvms.demon.co.uk

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From: nigel@openvms.demon.co.uk (Nigel Barker)
Subject: Alternative I/O address for Adaptec 1540B?
Date: 1995/12/05
Message-ID: <30c4b8c9.10949003@news.demon.co.uk>
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